HT86B05 datasheet(50/79 Pages) HOLTEK

50 / 79 page

HT86BXX/HT86BRXX

Rev. 1.60

October 20, 2009

Voice Output

Voice Control

The voice control register controls the voice ROM circuit

and the DAC circuit and selects the Voice ROM latch

counter. If the DAC circuit is not enabled, any DAH/DAL

outputs will be invalid. Writing a

²1² to the DAC bit will

enable the enable DAC circuit, while writing a

²0² to the

DAC bit will disable the DAC circuit. If the voice ROM cir-

cuit is not enabled, then voice ROM data cannot be ac-

cessed. Writing a

²1² to the VROMC bit will enable the

voice ROM circuit, while writing a

²0² to the VROMC bit

is will disable the voice ROM circuit. The LATCH bit de-

termines which voice ROM address latch counter will be

used as the voice ROM address latch counter.

Audio Output and Volume Control

- DAL, DAH, VOL

The audio output is 12-bits wide whose highest 8-bits

are written into the DAH register and whose lowest four

bits are written into the highest four bits of the DAL regis-

ter. Bits 0~3 of the DAL register are always read as zero.

There are 8 levels of volume which are setup using the

VOL register. Only the highest 3-bits of this register are

used for volume control, the other bits are not used and

read as zero.

Voice ROM Data Address Latch Counter

The Voice ROM address is 22-bits wide and therefore

requires three registers to store the address. There are

two sets of three registers to store this address, which

are LATCH0H/LATCH0M/LATCH0L and LATCH1H/

LATCH1M/LATCH1L. The 22-bit address stored in one

set of these three registers is used to access the 8-bit

voice code data in the Voice ROM. After the 8-bit Voice

ROM data is addressed, a few instruction cycles, of at

least 4us duration, are needed to latch the Voice ROM

data. After this the microcontroller can read the voice

data from the LATCHD register.

8 - b i t C o u n t e r

(

¸ 2 5 6 )

7 - b i t P r e s c a l e r

8 - t o - 1 M U X

W D T T i m e - o u t

W S 0 ~ W S 2

W D T C l o c k S o u r c e

C l e a r W D T T y p e

C o n f i g u r a t i o n O p t i o n

C L R W D T 1 F l a g

C L R W D T 2 F l a g

1 o r 2 I n s t r u c t i o n s

C L R

f S Y S / 4

W D T O s c i l l a t o r

W D T C l o c k S o u r c e

C o n f i g u r a t i o n O p t i o n

Watchdog Timer

V O I C E C R e g i s t e r

b 7

b 0

L A T C H C

V R O M C D A C

N o t i m p l e m e n t e d , r e a d a s " 0 "

D A C E n a b l e

1 : e n a b l e

0 : d i s a b l e

V o i c e R O M E n a b l e

1 : e n a b l e

0 : d i s a b l e

V o i c e R O M C o u n t e r S e l e c t

1 : A d d r e s s L a t c h 1

0 : A d d r e s s L a t c h 0

N o t i m p l e m e n t e d , r e a d a s " 0 "

VOICE Control Register

D A L R e g i s t e r

b 7

b 0

N o t u s e d , r e a d a s " 0 "

D 3

D 2

D 1

D 0

A u d i o o u t p u t

D i g i t a l t o A n a l o g D a t a L o w R e g i s t e r

D A H R e g i s t e r

b 7

b 0

D 1 1 D 1 0 D 9

D 8

A u d i o o u t p u t

D i g i t a l t o A n a l o g D a t a H i g h R e g i s t e r

V o l u m e C o n t r o l R e g i s t e r

D 7

D 6

D 5

D 4

V O L R e g i s t e r

b 7

b 0

N o t u s e d , r e a d a s " 0 "

D A v o l u m e c o n t r o l d a t a

V O L 2 V O L 1 V O L 0

U s e d b y P W M o u t p u t

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